Castor wheel



FIG. 1 is a front elevational view of a castor wheel showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevational view of a second embodiment of a castor wheel showing my new design;

FIG. 8 is a left side elevational view thereof;

FIG. 9 is a rear elevational view thereof;

FIG. 10 is a right side elevational view thereof;

FIG. 11 is a top plan view thereof;

FIG. 12 is a bottom plan view thereof;

FIG. 13 is a front elevational view of a third embodiment of a castor wheel showing my new design;

FIG. 14 is a left side elevational view thereof;

FIG. 15 is a rear elevational view thereof;

FIG. 16 is a right side elevational view thereof;

FIG. 17 is a top plan view thereof; and,

FIG. 18 is a bottom plan view thereof.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a castor wheel, as shown and described. 